Internal-combustion engine.



J. w. BURKETT'.

INTERNAL COMBUSTION ENGINE APPLICATION FILED JAN. 29. 1916.

1,253,933. Patented Jan. 15,191&

J. W. BUHKETT. INTERNAL COMBUSTION ENGINE.

APPLICATION FILED JAN.29. 1916. I 1,253,933. Patented Jan. 15, 1918.

2 SHEETSSHEET 2- HLIIIIIFT! "41 I 9 llllllll 6 i. to

" ization'by subjecting the incoming gases. to

UNITED STATES NT OFFICE COMPANY, OF COLUMBUS, OHIO, A CORPORATION OFOHIO."

- INTERNAL-COMBUSTIONENGINE,

To all whom it may concern:

. Columbus, in the county of Franklin and '5 State of Ohio, haveinvented certam new and useful Improvementsin Internal-CombustionEngines, of which the following is a specification.

g This invention relates to internal combustion engines and is directedprincipally to the provision of an improved type of valve structure, forgoverning the admission to and exhaust from the engine cylinder. In thisconnection, thefmain object of my invention resides in the provision ofa single valve, by means of which both'the fresh and the burned gasesare effectively controlled to and from the engine cylinder.

A further object of my invention resides in a structure of this typewhereby leakage of the gases from the cylinder, especially on thecompression stroke, is effectively overcome. ,Inldoing' this, I also soarrange this structure that the movin parts are well lubricated and alsomay he maintained in ,a comparatively cool state.

Still. a further object of my invention "resides in the combination of asleeve valve and ,apuppetvalve, the puppet valve being the prlmaryvalve, by means of which the gases 'tojand from. the engine cylinder arecontrolled. The sleeve valve. is arranged to. uncover the exhaustandintake passages atfthe propertime, while the puppet valve itselfisarranged to control these gases as .far as the engine cylinder.directly, 1s concerned; By this arrangement, both theexhaust, and theintake ""gases must pass the puppetvalve'and by means of this the pup-'et;.. valve is. cooled to an appreciable]. extent y coming in directcontact with the incoming gases onthe suction'stroke of the en-'gineand, further, these incoming gases are heated to an appreciableextent to. assist comparatively warm puppet valve. It will, therefore,appear that a, two-fold purpose is accomplished, that of keeping thepuppet valve inja statev of coolness which will preyentjits warping andalso of assisting vaporadditionalheat asthey enter the engine lcylindera Other objects of my. invention Wlllg become umo aappar nt a t r a furer eta led. e-

Speclfication of Letters. latent.

head, asis shown, audit is within thiscome vaporization by coming in:contact with, the

. Jenn w. nunxn'rr, or COLUMBUS, OHIO, ASSIGNOZR-TO THE nunxnr'rMANUFACTURING Patented Jan. 15, 1918]. v Applieationfiled January 29,1916. SerialNo; 75,160.

scription of the accompanying sheets of drawings, in which Similarcharacters of reference designate corresponding parts, and in which: I

Figure -1 is a vertical sectiontakenthrough the end of the cylindercarrying my in proved valve structure, a Fig. 2 is a side elevation ofthe structure shown in. Fig. 1, v i i Fig. 3 is a top plan view of thevalve actuating mechanism as shown in Figs. 1 and 2, i

Fig. 4 is a section taken Fig. 1, and, a a

Fig. 5 is an end elevation of the strucon line 4-4, of

ture shown in Figs. land ,2.

In these several views, the engine cylinder 18 shown at 1 and thiscylinder; is provided with a hopper2 which contains the cooling headintegral with the cylinder; and. pro vided the same with anexhaustpassage 3 and an intake passage l into which pipes and. 6 respectively,are threaded, which leadft o the muffler or directly into the,atmosphere-and to the carburete r generator respectively Both of thesepassages communicate with a common passage preferably disposed in thecenter of the cylinder mon passage that itself located.

This, valve mechanism comprises a cage member 7 closed at its outer endasis shown at8 and open at its inner end and-formed the valve mechanismis at its: inner end? With'a e seat, as is shown at9. This valve seat ispreferably of the tapered type, which taper leads in such direction.that the valve 10 operating in. conjunction with it, is. pressedthereagainst by the compression within the cylin-f deritself. This cageis also providedwith;

a series of spider arms 11 at.its innerend and this head 8 is aperturedto slidably. re i ceive the valve stemshown at 12,1it being this valveSlZEl'Il 12 which carries thepuppetf valve 10. at its; innerend, Thecage Tie further slotted. at its fiupper and lower" sides as is shownat13 and} 14 respectively, to

be in. alinement with-the respective exhaust,

and intake passages 3 and 4. Mounted in coiiperative relation with thecage 7 and supported thereon is a hollow sleeve valve 15, which sleeveis provided with the slotted openings 16 and 16. This sleeve, is made tohave a working fit with the engine frame and also with the cage, whileits outer end projects beyond the engine framework and is provided witha segmental rack such as is 10 shown at 17. The manner of operation ofthe sleeve valve is such that its opening 16' passes the intake passage4 during the suction stroke of the engine and the opening 16 asses theexhaust passage 3 during the ex haust stroke of the engine. Meanwhile,suct-ion created by the down stroke of the engine piston causes thepuppet valve 10 to open to permit the influx of a fresh charge, while onthe exhaust stroke, mechanism is 20 provided for positively opening thispuppet valve to permit the out-flow of the exhaust gases. In thismanner, both the intake and exhaust gases pass the valve 10 and,therefore, the heat interchange described in the foregoing part of thisspecification, will take place. It will be noted also that the puppetvalve 10 opens in such direction that the pressure within the enginecylinder on the compression and expansion stroke will tend to force thisvalve 10 against its seat 9 to prevent leakage and in order to pre ventleakage between the cage 7 and the engine framework, I have providedthis sleeve with an annular shoulder 18 whose tapered face' cooperateswith a similarly formed shoulder and face 19 of the engine framework. Itis desirable that the cooperating faces formed by the shoulders 18 and19 should be made very exact, which may be 40 accomplished by grinding,or they may be suitably packed in order to prevent leakage of the gasesfrom the engine cylinder through this point of connection. It will,therefore, appear that if this joint between the surfaces formed by theshoulders 18 and 19 is made tight in any one of a. number of practicalways in which this may be accomplished, the compression within thecylinder ,will always be held, inasmuch as it is only about the valve 10that these gases can then escape. This valve is held against its seat bythe internal pressure within the cylinder and is further prevented fromwarping by the cooling effect produced by the incoming gases and by thecooling effect of the water in the jacket space 20.

The actuating mechanism for the valve structure will now be described:It is desirable that the cage 7 should be held tightly in position toprevent its rotation and also to have a wedging bearing between thesurfaces formed by the shoulders 18 and 19. This is. accomplished bymeans of the frame piece formed by the arms shown at 21, 22 65 and 23,the arm 22 being provided with a 'on a stub shaft 34 rigidl hub 24through which the valve stem 12 passes. This hub is made to bear againstthe head 12 of the cage 7 by tightening of the bolts or screws 25, whichhold this frame piece'in position and in this manner the cage may be weded against its seat the desired extent. ThlS three arm framework 1sfurther provided with a rearward extension 26, which extension isL-shaped in general contour as is shown particularly clearly in Fig. 3,the portion 27 of this extension lying in central alinement with thecenter of the valve structure as a whole and theen= g'ine cylinder andbeing bored to slidably receive the 'valvestem 12. This valve stemcontinues rearwardly from this point and is provided at its outer endwith a washer shown at 28. A spring 29 is located between the portion 27of the three armed framework and the washer 28, in order that the valve10 may always be held a ainst its seat. This spring has a. tension su'cient to always seat the valve 10, but is also weak enough so that thesuction stroke of the engine will .open

the valve to permit the inflow of gases. It

will be noted that this may be very readily accomplished, inasmuch asthe spring 29 is located at a point remote from the intense heat createdby the burning gases and, therefore, it will retain its temper.

The mechanism provided for positively opening the puppet valve 10 on'thecompression stroke, comprises a finger 30 rigidly secured to the valvestem and arranged in such position to be engaged by the cam surface 31carried by an arm 32 which latter is integrally formed with the castingshown at 33. It will be noted that this cam surface is so inclined thatthe upper edge will be the initial portion to strike the finger 30 andbecause of the slower rate of movement of this portion as compared withthe farther end, there will be less likelihood of a pound. After theupper ortion has come into engagement, the remainder will graduallycontact with the fingerBO as the arm 32 continues to swing in a forwarddirection.

This latter casting 33 is rotatably mounted secured. to the L- hapedextension 26. T is casting 33 is further provided with a segmental gear,

shown at 34, designed to mesh with the segmental rack 17 and also with adown-stands ing arm 35 which is designed to be connected to the rodshown at 36, which latter runs to any desired portion of the enginemechanism for giving the desired valve motion. It will be noted that themotion desired is that of either an eccentric or crank, so that the rod36 will be given a movement back and forth.

The manner of operation of the actuating mechanism is as follows: A pullon the rod 36 will rotate the sleeve valve in a counter clockwisedirection, which brings the slot i 9 said cage.

mam

16 opposite the exhaust passage 3 and breaks the connection of the slot16 with the intake passage. Before the piston has reached the endqof itsexhaust stroke, the rod 36 will have begun a rearward movement, so thatat the end of the exhaust stroke the slot 16 will be in a position justpreceding its communication with the intake passage 4.

"Therefore, on the intake stroke this slot will move past the intakepassage and the communication between the exhaust passage and thecylinder will be broken. This oscillatory movement is maintainedthroughout the continued operation of the engine and in this manner theintake and exhaust gases are controlled as has been previously related.

What I claim, is:

1. In an internal combustim engine providedwith intake and exhaustpassages, a common passage leading into the engine cylinder andcommunicating with both the intake and-exhaust passages, a cage memberlocated withm said common passage and provided with a valve seat at itsinner end, a

ollow sleeve valve supported by said cage member, means for turning saidsleeve valve in such manner to uncover said intake and exhaust passagesin their proper order, and a primary valve worklng on the valve seat of2. In an internal combustionengine provided with intake and exhaustpassages, a common passage leading into the engine cylinderand'communicating with both the in topic: of this patent may be obtainedfor live cents each, by addressing the "commissioner of Washington, D.C. a

take and exhaust passages, a cage member located within said commonpassage and provided with a valve seat on its inner end a hollow sleevevalve supported on the exterior of said cage member, means forvlmpartingmot1on to said sleeve valve to uncover sald lntake and exhaust passagesm" a turnin their proper order, and a primary valve working in the valveseat of said cage.

3.. In an internal combustion englne pro-- vided with intake and exhaustpassages, a

common passage leading into the engine a cylinder and communicating withboth the intake and exhaust passages, a cage member located within saidcommon passage and provided with a valve seat on its inner end,

a hollow sleeve valve supported by said cage member, means forimpartinga turning motion to said sleeve valve to uncover sa d intakeand exhaust passages in their proper order, a primary puppet valveworklng on puppet valve slidably supported in said cage member andprojectlng out through the rear end thereof, and resilient meansoperatively' engaging theend of said stem projecting out of the rear ofsaid cage member.

In testimony whereof I afiix my signature in presence of two witnesses.

JOHN W. BURKETT.-

Witnesses:

C. B. HARDMAN, WALTER E. L. BOOK.

Ilhntl,

56 the valve seat of said cage, a stem on said

